تعيين تركيبات شيميايي و ضرايب هضم كاههاي ماش ، كنجد، گندم ، جو و برنج در استان خوزستان

Determination of chemical composition and digestion coefficient of the vetch, sesame, wheat, barley and rice straws

To ascertain of determining nutritive value and digestible efficiency and digestible energy of vetch straw, sesame straw, rice straw, wheat straw, and barley a total number of 20 heads mature male sheep were used and kept in 20 metabolic boxes with a complete randomized block design with 5 treatments and 4 replications. In this experiment the method for determination of digestion coefficent was a direct method with animal presentation (In vivo). Finally, The results were analysed and the average mean of treatments were compared with each other. On the basis of these results, the crud protein of sesame straw (12.38%) in comparison to other straws is showing significant increase (p<0.05), and crude protein of vetch straw (9.88%) in comparison to barley, wheat and rice straws (4.7,4.46 and 2.53% respectively) had significant differences. Also ether extract of sesame straw (3.73% in relative to barley, vetch, rice and wheat straws (1.97, 1, 0.83 and 0.55% respectively) remarkable differences was significant (p<0.05). Meanwhile, the crude fiber in wheat straw, barley and rice (41.58, 37. 94 and 35.32% respectively) has decreased and it doesnʹt have any significant differences with vetch and sesame straw (21.5 and 18.2%). On the basis of these results, the digestible coefficient of dry matter and crude protein of vetch straw (53.64 and 65.73%) and sesame straw (51.46 and 66.7%) in comparison to wheat straw (43.66 and 40.1%), barley straw (48.74 and 37.07%) and rice straw (44.25 and 41.01%) has significant differences (p<0.05). Also curde fiber digestible efficiency of sesame straw (61.5%) and rice straw (48.58%) has significant difference. The total digestible nutrient (TON) between vetch straw (48.73%) and wheat straw (43.65%) has been shown significant differences (p<0.05), but there is no significant difference between these two straws and barely, rice and sesame straws (47.84, 44.83 and 43.65% respectively). It is concluded that there was significant differences between digestible and metabolizable energy of barley straw (2.09 and 1.72 MCal/kg), wheat straw (1.86 and 1.53 MCaI/kg) and rice strraw (1.81 and 1.49 MCal/kg), however between digestible energy of vetch staw (2.02 and 1.65 MCaI/kg) and sesame straw (1.92 and 1.57 MCaI/kg) and other straws, the differences are not significant.